Hello,
If Windows 7 won’t activate properly, there might be an issue with an update that was installed via Windows Update, specifically, one for Windows Activation Technologies (KB971033).
If you know that your product key is genuine, removing and reinstalling this update could solve this problem.
Go to Start > Control Panel.
Open Programs and Features.
If you do not see that option, go to Programs first and then Programs and Features.
Select View installed updates on the left.
Search for KB971033 from the list of installed updates.
Right-click the update and select Uninstall.
Select Yes on the confirmation prompt, and then wait for Windows to uninstall the update.
Restart your computer.
It’d be a good idea to now check for updates again with Windows Update and then install any available ones, like a fresh version of this KB971033 update.
I hope this will help you!
Regards,